First make sure DM780 is configured correctly. From the View menu select Radio. In the Radio window press Configure. After you have read the help text check that you have entered the correct values in the Address and Port fields.

Address - the address or name of the computer where the HRD User Interface is running, localhost (or 127.0.0.1) can usually be used to connect to the local computer, the actual network address is shown in the IP Server window. Do NOT enter the address of the HRD Remote Server, always use the HRD User Interface address. Even if HRD is connected to a remote radio, you always connect to the HRD User Interface. 

Port - the default port is 7809, use the same port selected in the IP Server window in HRD.

If you have problems connecting DM780 to HRD:

• Make sure the IP Server in HRD is started:
  • From the Tools menu select IP Server.
  • Make sure it is started - the Listener status shows Started.
• If you are using a firewall make sure it is not blocking access to the IP Server port - the default is port number is 7809.

If you get a Timeout error then DM780 cannot connect to the computer where HRD is running - check the address entered in DM780.

If you get a Connection Refused error then DM780 can connect to the computer where HRD is running but either:

• The IP Server is not started, or
• A firewall is blocking access to the IP Server, or
• You entered the wrong port number in DM780.